Do Not Use GNU-Style Hashing on MIPS

(This is a merge of http://go/wvgerrit/14801)

The MIPS compiler does not support GNU hashing, which means this
compiler option needs to be excluded.

Bug: 19482469
Change-Id: I913f666a39eb535a33ebfbc49e5e7531115db5d4

libwvdrmengine/oemcrypto/test/common.mk

@@ -1,8 +1,12 @@
 LOCAL_PATH:= $(call my-dir)
 
+ifneq ($(TARGET_ARCH),mips)
+
 # Tests need to be compatible with devices that do not support gnu hash-style
 LOCAL_LDFLAGS+=-Wl,--hash-style=both
 
+endif
+
 LOCAL_SRC_FILES:= \
   oemcrypto_test.cpp \
   oemcrypto_test_android.cpp \