cmake-native: Fix host tool contamination

[v2 hopefully fixes the From: mangling by the ML, no functional changes]

Trying to build cmake-native on a host system where curl was built with cmake
(resulting in CURLConfig.cmake and friends, which do not use the same naming
schemes expected by cmake-native's build process, being installed to a system
wide cmake directory like /usr/lib64/cmake/CURL) results in undefined
references to all libcurl symbols.

The problem is that cmake-native sees and uses the system wide
/usr/lib64/cmake/CURL/CURLConfig.cmake, which defines CURL::libcurl and
CURL::curl as opposed to setting ${CURL_LIBRARIES} as expected by
cmake-native.

find_package(CURL) (cmake-native's CMakeLists.txt, line 478) succeeds, but
incorrectly uses the system wide CURLConfig.cmake, resulting
CMAKE_CURL_LIBRARIES to be set to an empty string (cmake-native's
CMakeLists.txt, line 484), causing the cmake-native build to miss -lcurl.

The simplest fix is to let cmake know the right value for
CURL_LIBRARIES. Making it -lcurl should always work with libcurl-native
in recipe-sysroot-native.

[YOCTO #14951]

(From OE-Core rev: 2659c735a464c956b4fca0894a5aed27a0fe7e37)

Signed-off-by: Bernhard Rosenkränzer <bero@baylibre.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/cmake/cmake-native_3.24.0.bb

@@ -32,6 +32,7 @@ CMAKE_EXTRACONF = "\
     -DCMAKE_USE_SYSTEM_LIBRARY_EXPAT=0 \
     -DENABLE_ACL=0 -DHAVE_ACL_LIBACL_H=0 \
     -DHAVE_SYS_ACL_H=0 \
+    -DCURL_LIBRARIES=-lcurl \
 "
 
 do_configure () {