Address x86 OEMCrypto compilation failures

b/71650075
Test: Verified by wv unit/integration tests on taimen, compilation on
      aosp_x86, sdk_gphone_x86

Change-Id: I62c132f1a904e613ce5ea2734822f2d9580d22ef

libwvdrmengine/level3/mips/Android.mk

@@ -4,6 +4,7 @@ LOCAL_CFLAGS := \
     -DDYNAMIC_ADAPTER \
     -Wno-unused
 LOCAL_C_INCLUDES := \
+    system/core/include \
     vendor/widevine/libwvdrmengine/cdm/core/include \
     vendor/widevine/libwvdrmengine/level3/include \
     vendor/widevine/libwvdrmengine/oemcrypto/include
@@ -18,4 +19,4 @@ LOCAL_PROPRIETARY_MODULE := true
 LOCAL_MODULE_TAGS := optional
 LOCAL_MODULE_OWNER := widevine
 LOCAL_MODULE_TARGET_ARCH := mips
-include $(BUILD_STATIC_LIBRARY)
+include $(BUILD_STATIC_LIBRARY)

libwvdrmengine/level3/mips64/Android.mk

@@ -4,6 +4,7 @@ LOCAL_CFLAGS := \
     -DDYNAMIC_ADAPTER \
     -Wno-unused
 LOCAL_C_INCLUDES := \
+    system/core/include \
     vendor/widevine/libwvdrmengine/cdm/core/include \
     vendor/widevine/libwvdrmengine/level3/include \
     vendor/widevine/libwvdrmengine/oemcrypto/include
@@ -18,4 +19,4 @@ LOCAL_PROPRIETARY_MODULE := true
 LOCAL_MODULE_TAGS := optional
 LOCAL_MODULE_OWNER := widevine
 LOCAL_MODULE_TARGET_ARCH := mips64
-include $(BUILD_STATIC_LIBRARY)
+include $(BUILD_STATIC_LIBRARY)

libwvdrmengine/level3/x86/Android.mk

@@ -4,6 +4,7 @@ LOCAL_CFLAGS := \
     -DDYNAMIC_ADAPTER \
     -Wno-unused
 LOCAL_C_INCLUDES := \
+    system/core/include \
     vendor/widevine/libwvdrmengine/cdm/core/include \
     vendor/widevine/libwvdrmengine/level3/include \
     vendor/widevine/libwvdrmengine/oemcrypto/include

libwvdrmengine/level3/x86_64/Android.mk

@@ -4,6 +4,7 @@ LOCAL_CFLAGS := \
     -DDYNAMIC_ADAPTER \
     -Wno-unused
 LOCAL_C_INCLUDES := \
+    system/core/include \
     vendor/widevine/libwvdrmengine/cdm/core/include \
     vendor/widevine/libwvdrmengine/level3/include \
     vendor/widevine/libwvdrmengine/oemcrypto/include