Fix case-sensitive build system errors.

webrtc/build/ios/build_ios_libs.sh

Index: webrtc/build/ios/build_ios_libs.sh
diff --git a/webrtc/build/ios/build_ios_libs.sh b/webrtc/build/ios/build_ios_libs.sh
index c368715254c8065237c87161f04e4e0fa5db24ca..a0a0b6dfad7bbe5c122d5e09bdfe627710bd683b 100755
--- a/webrtc/build/ios/build_ios_libs.sh
+++ b/webrtc/build/ios/build_ios_libs.sh
@@ -216,11 +216,11 @@ if [[ ${BUILD_TYPE} = "framework" ]]; then
 
   # Modify the version number.
   INFOPLIST_PATH=${OUTPUT_DIR}/WebRTC.framework/Info.plist
-  MAJOR_MINOR=$(plistbuddy -c "Print :CFBundleShortVersionString" \
+  MAJOR_MINOR=$(PlistBuddy -c "Print :CFBundleShortVersionString" \
                 ${INFOPLIST_PATH})
   VERSION_NUMBER="${MAJOR_MINOR}.${POINT_VERSION}"
   echo "Substituting revision number: ${VERSION_NUMBER}"
-  plistbuddy -c "Set :CFBundleVersion ${VERSION_NUMBER}" ${INFOPLIST_PATH}
+  PlistBuddy -c "Set :CFBundleVersion ${VERSION_NUMBER}" ${INFOPLIST_PATH}
   plutil -convert binary1 ${INFOPLIST_PATH}
 
   # Copy pod file.