perlcross: not break build if already patched

Currently the build will break if the patch already applied
as the return value of "test ! -f $@" is not 0, so make sure
to return 0 if the patch already applied.

Fixes:
 $ bitbake perl-native

 Make a change as below
 $ git diff
 diff --git a/meta/recipes-devtools/perl-cross/perlcross_1.3.6.bb b/meta/recipes-devtools/perl-cross/perlcross_1.3.6.bb
 index b77bbd1fd4..4c5e35ab80 100644
 --- a/meta/recipes-devtools/perl-cross/perlcross_1.3.6.bb
 +++ b/meta/recipes-devtools/perl-cross/perlcross_1.3.6.bb
 @@ -33,6 +33,7 @@ do_compile () {
  do_install_class-native() {
      mkdir -p ${D}/${datadir}/perl-cross/
      cp -rf ${S}/* ${D}/${datadir}/perl-cross/
 +    echo "test" > ${D}/${datadir}/perl-cross/testfile
 }

 $ bitbake perl-native
NOTE: make -j 40
make crosspatch
make[1]: Entering directory '/build/tmp-glibc/work/x86_64-linux/perl-native/5.34.0-r0/perl-5.34.0'
test ! -f cnf/diffs/perl5-5.34.0/posix-makefile.applied && (patch -p1 -i cnf/diffs/perl5-5.34.0/posix-makefile.patch && touch cnf/diffs/perl5-5.34.0/posix-makefile.applied)
test ! -f cnf/diffs/perl5-5.34.0/dynaloader.applied && (patch -p1 -i cnf/diffs/perl5-5.34.0/dynaloader.patch && touch cnf/diffs/perl5-5.34.0/dynaloader.applied)
make[1]: *** [Makefile:64: cnf/diffs/perl5-5.34.0/posix-makefile.applied] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: *** [Makefile:64: cnf/diffs/perl5-5.34.0/dynaloader.applied] Error 1
make[1]: Leaving directory '/build/tmp-glibc/work/x86_64-linux/perl-native/5.34.0-r0/perl-5.34.0'
make: *** [Makefile:78: all] Error 2

(From OE-Core rev: 354163db5588d87941f53a2763be62b2430cc1fc)

Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit dd5ebf4fdd3ccbe937001a777ad7fcc1e1319e94)
Change-Id: I5ff726eb777d5efcfe0cab7364763c646cab1ecb
diff --git a/poky/meta/recipes-devtools/perl-cross/files/0001-Makefile-check-the-file-if-patched-or-not.patch b/poky/meta/recipes-devtools/perl-cross/files/0001-Makefile-check-the-file-if-patched-or-not.patch
index fb7b287..8c8f3b7 100644
--- a/poky/meta/recipes-devtools/perl-cross/files/0001-Makefile-check-the-file-if-patched-or-not.patch
+++ b/poky/meta/recipes-devtools/perl-cross/files/0001-Makefile-check-the-file-if-patched-or-not.patch
@@ -22,7 +22,7 @@
  # and if that fails, reaching for the source tarball is the safest option.
  $(CROSSPATCHED): %.applied: %.patch
 -	patch -p1 -i $< && touch $@
-+	test ! -f $@ && (patch -p1 -i $< && touch $@)
++	test ! -f $@ && (patch -p1 -i $< && touch $@) || echo "$@ exist"
  
  # ---[ common ]-----------------------------------------------------------------