Fix scripts to use /bin/true consistently.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15392 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/tests/check_isa-2_06_cap b/tests/check_isa-2_06_cap
index b8ec37f..68401fc 100755
--- a/tests/check_isa-2_06_cap
+++ b/tests/check_isa-2_06_cap
@@ -2,7 +2,7 @@
 
 # We use this script to check whether or not the processor supports Power ISA 2.06 or later.
 DIR="$( cd "$( dirname "$0" )" && pwd )"
-LD_SHOW_AUXV=1 $DIR/true | grep  arch_2_06 > /dev/null 2>&1
+LD_SHOW_AUXV=1 /bin/true | grep  arch_2_06 > /dev/null 2>&1
 
 if [ "$?" -ne "0" ]; then
 	exit 1
diff --git a/tests/check_isa-2_07_cap b/tests/check_isa-2_07_cap
index 8b991e5..e268d73 100755
--- a/tests/check_isa-2_07_cap
+++ b/tests/check_isa-2_07_cap
@@ -3,7 +3,7 @@
 # We use this script to check whether or not the processor supports
 # Power ISA 2.07.
 DIR="$( cd "$( dirname "$0" )" && pwd )"
-LD_SHOW_AUXV=1 $DIR/true | grep  arch_2_07 > /dev/null 2>&1
+LD_SHOW_AUXV=1 /bin/true | grep  arch_2_07 > /dev/null 2>&1
 
 if [ "$?" -ne "0" ]; then
 	exit 1