get_webrtc ends/halts with an error (Mac OSX Yosemite and Ubuntu 14.04) about webrtc-build-scripts HOT 7 CLOSED

5> Downloading src/resources/audio_coding/F05.BIT20...
1> Downloading src/resources/audio_coding/F00.OUT20...
6> Downloading src/resources/audio_coding/F01.OUT30...
3> Downloading src/resources/audio_coding/neteq_universal_ref.pcm...
8> Downloading src/resources/audio_coding/teststereo32kHz.pcm...
0> Downloading src/resources/audio_coding/F06.INP...
Hook 'download_from_google_storage --directory --recursive --num_threads=10 --no_auth --bucket chromium-webrtc-resources src/resources' took 2390.32 secs

________ running '/usr/bin/python src/webrtc/build/gyp_webrtc -Dextra_gyp_flag=0' in '/home/rishabh/webrtc-build-scripts/android/webrtc'
Updating projects from gyp files...
Package glib-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `glib-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'glib-2.0' found
Package gobject-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gobject-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gobject-2.0' found
Package gthread-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gthread-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gthread-2.0' found
Package gtk+-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gtk+-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gtk+-2.0' found
gyp: Call to 'pkg-config --libs-only-l glib-2.0 gobject-2.0 gthread-2.0 gtk+-2.0' returned exit status 1.
Package gobject-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gobject-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gobject-2.0' found
Package gthread-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gthread-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gthread-2.0' found
Package gtk+-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gtk+-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gtk+-2.0' found
gyp: Call to 'pkg-config --libs-only-l gobject-2.0 gthread-2.0 gtk+-2.0' returned exit status 1.
Error: Command /usr/bin/python src/webrtc/build/gyp_webrtc -Dextra_gyp_flag=0 returned non-zero exit status 1 in /home/rishabh/webrtc-build-scripts/android/webrtc

/home/rishabh/webrtc-build-scripts/android/webrtc/libjingle_peerconnection_builds/Release/jniLibs/x86_64 directory not found, creating...
directory created at /home/rishabh/webrtc-build-scripts/android/webrtc/libjingle_peerconnection_builds/Release/jniLibs/x86_64
  adding: jniLibs/ (stored 0%)
  adding: jniLibs/x86_64/ (stored 0%)
  adding: jniLibs/x86_64/libjingle_peerconnection_so.so (deflated 58%)
  adding: jniLibs/x86/ (stored 0%)
  adding: jniLibs/x86/libjingle_peerconnection_so.so (deflated 58%)
  adding: jniLibs/armeabi_v7a/ (stored 0%)
  adding: jniLibs/armeabi_v7a/libjingle_peerconnection_so.so (deflated 43%)
  adding: res/ (stored 0%)
  adding: libs/ (stored 0%)
  adding: libs/libjingle_peerconnection.jar (deflated 10%)
Release build for apprtc complete for revision 8148