Fixed link-error for standalone emulator when CONFIG_ANDROID_OPENGLES == 0

Added a fake android_getOpenglesHardwareStrings (called in vl-android.c)
when CONFIG_ANDROID_OPENGLES is not set or zero.  This happens when
./android-configure.sh can't locate GLES include and libs.

Change-Id: I1f99644adcc78b9872d7e9c6e1e7bd7b2a654119
diff --git a/android/opengles.c b/android/opengles.c
index 521dc03..70e3f8c 100644
--- a/android/opengles.c
+++ b/android/opengles.c
@@ -12,6 +12,7 @@
 
 #include "config-host.h"
 #include "android/opengles.h"
+#include <assert.h>
 
 /* Declared in "android/globals.h" */
 int  android_gles_fast_pipes = 1;
@@ -273,6 +274,15 @@
     return -1;
 }
 
+void android_getOpenglesHardwareStrings(char* vendor, size_t vendorBufSize,
+                                       char* renderer, size_t rendererBufSize,
+                                       char* version, size_t versionBufSize)
+{
+    assert(vendorBufSize > 0 && rendererBufSize > 0 && versionBufSize > 0);
+    assert(vendor != NULL && renderer != NULL && version != NULL);
+    vendor[0] = renderer[0] = version[0] = 0;
+}
+
 void android_stopOpenglesRenderer(void)
 {}