dtrace tests: Run ksh with -p

In particular, avoid loading the user's .profile file, since that can
have undesirable side effects.  Most tests were already careful to do
this.

MFC after:	1 week

(cherry picked from commit e25922b34e)

cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/err.D_PDESC_ZERO.badlib.exe

@@ -1,4 +1,4 @@
-#!/usr/bin/env ksh
+#!/usr/local/bin/ksh -p
 #
 # CDDL HEADER START
 #

cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/err.D_PROC_FUNC.badfunc.exe

@@ -1,4 +1,4 @@
-#!/usr/bin/env ksh
+#!/usr/local/bin/ksh -p
 #
 # CDDL HEADER START
 #

cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/err.D_PROC_LIB.libdash.exe

@@ -1,4 +1,4 @@
-#!/usr/bin/env ksh
+#!/usr/local/bin/ksh -p
 #
 # CDDL HEADER START
 #

cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/err.D_PROC_NAME.alldash.exe

@@ -1,4 +1,4 @@
-#!/usr/bin/env ksh
+#!/usr/local/bin/ksh -p
 #
 # CDDL HEADER START
 #

cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/err.D_PROC_NAME.badname.exe

@@ -1,4 +1,4 @@
-#!/usr/bin/env ksh
+#!/usr/local/bin/ksh -p
 #
 # CDDL HEADER START
 #

cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/err.D_PROC_NAME.globdash.exe

@@ -1,4 +1,4 @@
-#!/usr/bin/env ksh
+#!/usr/local/bin/ksh -p
 #
 # CDDL HEADER START
 #

cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/err.D_PROC_OFF.toobig.exe

@@ -1,4 +1,4 @@
-#!/usr/bin/env ksh
+#!/usr/local/bin/ksh -p
 #
 # CDDL HEADER START
 #

cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.coverage.exe

@@ -1,4 +1,4 @@
-#!/usr/bin/env ksh
+#!/usr/local/bin/ksh -p
 #
 # CDDL HEADER START
 #

cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.emptystack.exe

@@ -1,4 +1,4 @@
-#!/usr/bin/env ksh
+#!/usr/local/bin/ksh -p
 #
 # CDDL HEADER START
 #

cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/speculation/tst.NoSpecBuffer.exe

@@ -1,4 +1,4 @@
-#!/usr/bin/env ksh
+#!/usr/local/bin/ksh -p
 #
 # CDDL HEADER START
 #

cddl/usr.sbin/dtrace/tests/tools/dtest.sh

@@ -70,7 +70,7 @@ runtest()
     err.*.ksh|tst.*.ksh)
         expr "$TFILE" : 'err.*' >/dev/null && exstatus=1
 
-        tst=$TFILE ksh "$TFILE" /usr/sbin/dtrace >$STDOUT 2>$STDERR
+        tst=$TFILE ksh -p "$TFILE" /usr/sbin/dtrace >$STDOUT 2>$STDERR
         status=$?
 
         if [ $status -ne $exstatus ]; then
@@ -86,7 +86,7 @@ runtest()
 
     if [ $retval -eq 0 ] && \
         head -n 1 $STDOUT | grep -q -E '^#!/.*ksh$'; then
-        ksh $STDOUT
+        ksh -p $STDOUT
         retval=$?
     fi