Fix clang static analyzer warnings.

frameworks/native/cmds/flatland/GLHelper.cpp:366:9: warning: Potential
leak of memory pointed to by 'src'

Test: Warning no longer appears
Change-Id: I2721d292cf1f387f34fb2e69f8370f1abff3f01f
diff --git a/cmds/flatland/GLHelper.cpp b/cmds/flatland/GLHelper.cpp
index ddf3aa8..5c04f6c 100644
--- a/cmds/flatland/GLHelper.cpp
+++ b/cmds/flatland/GLHelper.cpp
@@ -365,6 +365,7 @@
     if (!result) {
         fprintf(stderr, "Shader source:\n");
         printShaderSource(lines);
+        delete[] src;
         return false;
     }
     delete[] src;