Make NDK_ANALYZE work with both GCC and Clang.

Not sure why this was ever hard wired to GCC. We can support both
easily enough.

Test: ndk-build NDK_ANALYZE=1 V=1
Test: ndk-build NDK_ANALYZE=1 V=1 NDK_TOOLCHAIN_VERSION=4.9
Bug: android/ndk#362
Change-Id: I378b95f76225ac09d0e0abe89d4d6022e74c8bd7

build/ndk-build

@@ -260,13 +260,23 @@ if [ "$NDK_ANALYZE" = 1 ]; then
  }
 
  APP_ABIS=`get_build_var APP_ABI`
+ TOOLCHAIN=`get_build_var NDK_TOOLCHAIN_VERSION`
  for ABI in $APP_ABIS; do
  TOOLCHAIN_PREFIX=`get_build_var_for_abi TOOLCHAIN_PREFIX $ABI`
  LLVM_PATH=$ANDROID_NDK_ROOT/toolchains/llvm/prebuilt/$HOST_TAG
+
+ if [ "$TOOLCHAIN" = "clang" ]; then
+ ANALYZER_CC=$LLVM_PATH/bin/clang
+ ANALYZER_CXX=$LLVM_PATH/bin/clang++
+ else
+ ANALYZER_CC=${TOOLCHAIN_PREFIX}gcc
+ ANALYZER_CXX=${TOOLCHAIN_PREFIX}g++
+ fi
+
  perl $LLVM_PATH/tools/scan-build/bin/scan-build \
  --use-analyzer $LLVM_PATH/bin/${ABI}/analyzer \
- --use-cc ${TOOLCHAIN_PREFIX}gcc \
- --use-c++ ${TOOLCHAIN_PREFIX}g++ \
+ --use-cc $ANALYZER_CC \
+ --use-c++ $ANALYZER_CXX \
  --status-bugs \
  $GNUMAKE -f $PROGDIR/core/build-local.mk "$@" APP_ABI=$ABI
  done