toolchain: Bump everything to pull in required SPIR-V tools revision

Encompasses pull request #261 from Chris.

Also gets things building again reflecting upstream changesi, mainly
HLSL libs for glslang.

Desktop build/test results w/ update_external_sources.sh/bat
 Windows on Skylake: _run_all_tests.ps1, demos with --validate
 Ubuntu on Skylake: vk_layer_validation_tests, cube --validate

Android build/test results w/ update_external_sources_android.sh/bat:
 Windows: VkLayerValidationTests pass
 OSX: VkLayerValidationTests pass
 Ubuntu: VkLayerValidationTests pass
diff --git a/build-android/glslang_revision_android b/build-android/glslang_revision_android
index c48dee1..56c5bed 100644
--- a/build-android/glslang_revision_android
+++ b/build-android/glslang_revision_android
@@ -1 +1 @@
-3c5b1e6b31aca0eb52fe7e82a963ff735f1de31b
+d99524197f3b68dbd6267bd3f4d7e8a0f49167b4
diff --git a/build-android/jni/Android.mk b/build-android/jni/Android.mk
index 96df1fa..8b43750 100644
--- a/build-android/jni/Android.mk
+++ b/build-android/jni/Android.mk
@@ -157,6 +157,11 @@
 include $(PREBUILT_STATIC_LIBRARY)
 
 include $(CLEAR_VARS)
+LOCAL_MODULE := HLSL-prebuilt
+LOCAL_SRC_FILES := $(SRC_DIR)/../shaderc/android_test/obj/local/$(TARGET_ARCH_ABI)/libHLSL.a
+include $(PREBUILT_STATIC_LIBRARY)
+
+include $(CLEAR_VARS)
 LOCAL_MODULE := shaderc_util-prebuilt
 LOCAL_SRC_FILES := $(SRC_DIR)/../shaderc/android_test/obj/local/$(TARGET_ARCH_ABI)/libshaderc_util.a
 include $(PREBUILT_STATIC_LIBRARY)
@@ -185,7 +190,7 @@
                     $(SRC_DIR)/../shaderc/libshaderc/include/
 
 LOCAL_STATIC_LIBRARIES := googletest_main layer_utils
-LOCAL_SHARED_LIBRARIES += shaderc-prebuilt glslang-prebuilt OGLCompiler-prebuilt OSDependent-prebuilt shaderc_util-prebuilt SPIRV-prebuilt SPIRV-Tools-prebuilt
+LOCAL_SHARED_LIBRARIES += shaderc-prebuilt glslang-prebuilt OGLCompiler-prebuilt OSDependent-prebuilt HLSL-prebuilt shaderc_util-prebuilt SPIRV-prebuilt SPIRV-Tools-prebuilt
 LOCAL_CPPFLAGS += -DVK_USE_PLATFORM_ANDROID_KHR --include=$(SRC_DIR)/tests/vulkan_wrapper.h
 LOCAL_LDLIBS := -llog
 include $(BUILD_EXECUTABLE)
diff --git a/build-android/shaderc_revision_android b/build-android/shaderc_revision_android
index 04b2324..8187523 100644
--- a/build-android/shaderc_revision_android
+++ b/build-android/shaderc_revision_android
@@ -1 +1 @@
-53cf6692879c6dcd5f4ccdffb8c10bb17b5e9d55
+4213a472474053f456464b7d00d14adf814ecc44
diff --git a/build-android/spirv-tools_revision_android b/build-android/spirv-tools_revision_android
index e83c901..9a829b9 100644
--- a/build-android/spirv-tools_revision_android
+++ b/build-android/spirv-tools_revision_android
@@ -1 +1 @@
-9149a66ca406d86967b104cac209bad309fd2c33
+469f0e8fd53b527ad410c46bf18eee327c9256a3
diff --git a/build-android/update_external_sources_android.bat b/build-android/update_external_sources_android.bat
index f2b719f..08d9630 100755
--- a/build-android/update_external_sources_android.bat
+++ b/build-android/update_external_sources_android.bat
@@ -116,7 +116,7 @@
    if exist %SPIRV_TOOLS_DIR% (
       rd /S /Q %SPIRV_TOOLS_DIR%
    )
-   if %errorlevel% neq 0 (goto:error)
+   if %ERRORLEVEL% neq 0 (goto:error)
    if not exist %SPIRV_TOOLS_DIR% (
       call:create_spirv-tools
    )
@@ -162,7 +162,7 @@
 
 :create_glslang
    echo.
-   echo Creating local glslang repository %GLSLANG_DIR%)
+   echo Creating local glslang repository %GLSLANG_DIR%
    mkdir %GLSLANG_DIR%
    cd %GLSLANG_DIR%
    git clone https://github.com/KhronosGroup/glslang.git .
@@ -179,11 +179,15 @@
    cd %GLSLANG_DIR%
    git fetch --all
    git checkout %GLSLANG_REVISION%
+   if not exist %GLSLANG_DIR%\SPIRV (
+      echo glslang source update failed!
+      set errorCode=1
+   )
 goto:eof
 
 :create_spirv-tools
    echo.
-   echo Creating local spirv-tools repository %SPIRV_TOOLS_DIR%)
+   echo Creating local spirv-tools repository %SPIRV_TOOLS_DIR%
    mkdir %SPIRV_TOOLS_DIR%
    cd %SPIRV_TOOLS_DIR%
    git clone https://github.com/KhronosGroup/SPIRV-Tools.git .
@@ -200,6 +204,10 @@
    cd %SPIRV_TOOLS_DIR%
    git fetch --all
    git checkout %SPIRV_TOOLS_REVISION%
+   if not exist %SPIRV_TOOLS_DIR%\source (
+      echo spirv-tools source update failed!
+      set errorCode=1
+   )
 goto:eof
 
 :create_shaderc
@@ -221,6 +229,10 @@
    cd %SHADERC_DIR%
    git fetch --all
    git checkout %SHADERC_REVISION%
+   if not exist %SHADERC_DIR%\libshaderc (
+      echo shaderc source update failed!
+      set errorCode=1
+   )
 goto:eof
 
 :build_shaderc