[monodroid] Fix COMMON_CFLAGS usage. (#82)

* Fix monodroid COMMON_CFLAGS usage and always build with RELEASE.

The primary problem was that when app launches it tries to load assemblies:

	W/monodroid( 2061): Using override path: /data/data/com.xamarin.android.helloworld/files/.__override__

It should not happen, because we don't have fastdev here.

However, it was weird, that the problem occured even with app Release builds.

Turned out that in src/monodroid, Android.mk referenced COMMON_FLAGS,
which did not exist. Fix typo.

Then, since we don't have fastdev, monodroid needs to be built always
in RELEASE mode. So, add -DRELEASE=1 even for Debug build.

* Remove RELEASE build flag from common. Instead default xabuild to Release.

Author: atsushieno

src/monodroid/jni/Android.mk

@@ -8,7 +8,7 @@ else
 COMMON_CFLAGS ?= -g -O2 -DRELEASE=1
 endif
 
-LOCAL_CFLAGS =	$(COMMON_FLAGS) \
+LOCAL_CFLAGS =	$(COMMON_CFLAGS) \
 	-std=c99 \
 	-DHAVE_LINUX_NETLINK_H=1 -DHAVE_LINUX_RTNETLINK_H=1 \
 	-D_REENTRANT -DPLATFORM_ANDROID -DANDROID -DLINUX -Dlinux -D__linux_ \

tools/scripts/xabuild

@@ -18,7 +18,7 @@ ANDROID_SDK_PATH=$(echo $ANDROID_SDK_PATH | sed 's/^\w*//g')
 export ANDROID_NDK_PATH
 export ANDROID_SDK_PATH
 
-exec xbuild $MSBUILD_OPTIONS \
+exec xbuild /p:Configuration=Release $MSBUILD_OPTIONS \
 	/p:AndroidNdkDirectory="$ANDROID_NDK_PATH" \
 	/p:AndroidSdkDirectory="$ANDROID_SDK_PATH" \
 	/p:MonoDroidInstallDirectory="$MONO_ANDROID_PATH" \