package/libmodsecurity: select pcre2

Commit ea746f312844df298bbc9a697ca178f3a3c67a8f forgot to select pcre2
resulting in the following build failure:

Makefile:575: *** pcre2 is in the dependency chain of libmodsecurity that has added it to its _DEPENDENCIES variable without selecting it or depending on it from Config.in.  Stop.

Fixes:
 - http://autobuild.buildroot.org/results/6528d2611bd1a45c1e94bc6b866de9c33dd90a7b

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libmodsecurity/Config.in

@@ -4,7 +4,7 @@ config BR2_PACKAGE_LIBMODSECURITY
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	# libmodsecurity embeds several mbedtls source files
 	depends on !(BR2_STATIC_LIBS && BR2_PACKAGE_LIBCURL_MBEDTLS)
-	select BR2_PACKAGE_PCRE
+	select BR2_PACKAGE_PCRE2
 	help
 	  Libmodsecurity is one component of the ModSecurity
 	  v3 project. The library codebase serves as an