tools/cmake: fix typo in parallel make patch

The variable in the case argument was mistyped, so the case always
checked against an empty string and never matched.

Fix the variable name. Add a PKG_RELEASE to Makefile so we can bump it.

Fixes: d6de31310c ("cmake: restore parallel build support for bootstrap")

Signed-off-by: Piotr Stefaniak <pstef@freebsd.org>
[add commit message, add PKG_RELEASE, fix commit title, add Fixes:]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
(cherry picked from commit e27fbae63c)

tools/cmake/Makefile

@@ -8,6 +8,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=cmake
 PKG_VERSION:=3.15.1
+PKG_RELEASE:=2
 PKG_CPE_ID:=cpe:/a:kitware:cmake
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz

tools/cmake/patches/130-bootstrap_parallel_make_flag.patch

@@ -5,7 +5,7 @@
  cmake_original_make_flags="${cmake_make_flags}"
  if [ "x${cmake_parallel_make}" != "x" ]; then
 -  cmake_make_flags="${cmake_make_flags} -j ${cmake_parallel_make}"
-+  case "$cmake_paralle_make" in
++  case "$cmake_parallel_make" in
 +    [0-9]*) cmake_parallel_make="-j ${cmake_parallel_make}";;
 +  esac
 +  cmake_make_flags="${cmake_make_flags} ${cmake_parallel_make}"