Generalize valgrind suppressions for NV driver.

Review URL: https://codereview.chromium.org/723603003
diff --git a/tools/valgrind.supp b/tools/valgrind.supp
index a7562dc..944fa1e 100644
--- a/tools/valgrind.supp
+++ b/tools/valgrind.supp
@@ -67,13 +67,13 @@
     Memcheck:Param
     write(buf)
     ...
-    obj:/usr/lib/libnvidia-glcore.so*
+    obj:*/libnvidia-glcore.so*
 }
 {
     nv_driver_bug_2
     Memcheck:Cond
     ...
-    obj:/usr/lib/libnvidia-glcore.so*
+    obj:*/libnvidia-glcore.so*
 }
 {
     nv_driver_bug_3