Add new option --show-possible to valgrind for later use by valgrind_test.py ...

tools/valgrind/build-valgrind-for-chromium.sh

 #!/bin/sh
 # Script to build valgrind for use with chromium
 
 THISDIR=`dirname $0`
 THISDIR=`cd $THISDIR && /bin/pwd`
 set -x
 set -e
 
 if ld --version | grep gold
 then
@@ skipping 24 matching lines @@
 # Work around bug https://bugs.kde.org/show_bug.cgi?id=162848
 # "fork() not handled properly"
 #wget -O fork.patch "https://bugs.kde.org/attachment.cgi?id=35510"
 patch -p0 < "$THISDIR"/fork.patch
 
 # Work around bug https://bugs.kde.org/show_bug.cgi?id=186796
 # "long suppressions truncated"
 #wget -O longlines.patch "https://bugs.kde.org/attachment.cgi?id=35174"
 patch -p0 < "$THISDIR"/longlines.patch
 
+# Add feature bug https://bugs.kde.org/show_bug.cgi?id=201170
+# "Want --show-possible option so I can ignore the bazillion possible leaks..."
+#wget -O possible.patch https://bugs.kde.org/attachment.cgi?id=35559
+patch -p0 < "$THISDIR"/possible.patch
+
 sh autogen.sh
 ./configure --prefix=/usr/local/valgrind-20090715
 make -j4
 
 if ./vg-in-place /bin/true
 then
   echo built valgrind passes smoke test, good
 else
   echo built valgrind fails smoke test
   exit 1
 fi
 
 test -d $THISDIR/override_ld && rm -rf $THISDIR/override_ld
 
 sudo make install
 cd /usr
 test -f bin/valgrind && sudo mv bin/valgrind bin/valgrind.orig
 sudo ln -sf /usr/local/valgrind-20090715/bin/valgrind bin
 test -d include/valgrind && sudo mv include/valgrind include/valgrind.orig
 sudo ln -sf /usr/local/valgrind-20090715/include/valgrind include