[roll] Roll fuchsia [rbe][gcc] fix gcc tools path

gcc sets up a COMPILER_PATH based on some non-normalized paths
including lib/gcc.  Even when no files from that directory are needed
by the compiler (driver), that directory still needs to exist remotely
for the remote gcc to work correctly.

Original-Bug: 109078
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/845077
Original-Revision: 6a752abdd9c057c8a4d44ad3f14b67a3007f31fd
GitOrigin-RevId: b976c59b339806dff9948779a84f6999db8e011e
Change-Id: I61b2222983899732e213b81ae8d57ce8d605b50e
diff --git a/stem b/stem
index 97e4d69..e7b3063 100644
--- a/stem
+++ b/stem
@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="0d7bfcc41c0619f5296a3a12dce30556b3073e02"/>
+             revision="6a752abdd9c057c8a4d44ad3f14b67a3007f31fd"/>
   </projects>
   <hooks>
     <hook name="install-environment"