fixing a small error in the armeabi selection

android/android-jni/Makefile

@@ -13,7 +13,7 @@ $(error Please setup the $(LOCAL_ENV_MK) - the default was just created')
 endif
 
 ifndef ARM_TARGETS
-ARM_TARGETS=armeabi armeabi-v7a
+ARM_TARGETS="armeabi armeabi-v7a"
 endif
 
 ANDROID_NDK_BASE = $(ANDROID_NDK_ROOT)

android/android-jni/sample.local.env.mk

@@ -7,4 +7,4 @@ OPENCV_CONFIG=../build/android-opencv.mk
 ANDROID_NDK_ROOT=$(HOME)/android-ndk-r4-crystax
 
 #define only armeabi-v7a to make the final apk smaller or armeabi
-ARM_TARGETS=armeabi armeabi-v7a
\ No newline at end of file
+ARM_TARGETS="armeabi armeabi-v7a"
\ No newline at end of file