package/libzenoh-c: add GLIBC and aarch64, x86_64 and arm dependencies

The manual of zenoh-c says that:

zenoh-c only have support for following targets:
aarch64-unknown-linux-gnu, x86_64-unknown-linux-gnu, arm-unknown-linux-gnueabi

This patch provides a blind option BR2_PACKAGE_LIBZENOH_C_ARCH_SUPPORTS,
which is default y for above architectures. Additionally adds a dependency on
GLIBC because one of the autobuilders had a problem with MUSL. Moved also the
BR2_PACKAGE_HOST_RUSTC_TARGET_ARCH_SUPPORTS from package's dependency
list to the BR2_PACKAGE_LIBZENOH_C_ARCH_SUPPORTS option.

Fixes:
http://autobuild.buildroot.net/results/680f25769526e5eef43d254a10a525b165846c75
http://autobuild.buildroot.net/results/31ed69cb2ffe8e9bc13a27c3fda16c27e9855b56
http://autobuild.buildroot.net/results/fdc74b8a42388b51cc4197c38b552559b97cbb8c
http://autobuild.buildroot.net/results/6e7ad53d44b417f6aa62acd8b2396720f5a14e82
http://autobuild.buildroot.net/results/c85927b1dd25a84981adc5cc537eb07d02da40bc
http://autobuild.buildroot.net/results/5389ac0174791b3d899fda7769b4f0f2dfeb805b
http://autobuild.buildroot.net/results/285bd8f5aa338dbaf9ac0e5f78593b10bd54cbb5

Signed-off-by: Alex Michel <alex.michel@wiedemann-group.com>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>

package/libzenoh-c/Config.in

@@ -1,9 +1,21 @@
+config BR2_PACKAGE_LIBZENOH_C_ARCH_SUPPORTS
+	bool
+	default y if BR2_aarch64
+	default y if BR2_arm
+	default y if BR2_x86_64
+	depends on BR2_PACKAGE_HOST_RUSTC_TARGET_ARCH_SUPPORTS
+
 config BR2_PACKAGE_LIBZENOH_C
 	bool "libzenoh-c"
-	depends on BR2_PACKAGE_HOST_RUSTC_TARGET_ARCH_SUPPORTS
+	depends on BR2_PACKAGE_LIBZENOH_C_ARCH_SUPPORTS
+	depends on BR2_TOOLCHAIN_USES_GLIBC
 	select BR2_PACKAGE_HOST_RUSTC
 	help
 	  This package provides a C binding based on the main
 	  Zenoh implementation written in Rust.
 
 	  https://github.com/eclipse-zenoh/zenoh-c
+
+comment "libzenoh-c needs a glibc toolchain"
+	depends on BR2_PACKAGE_LIBZENOH_C_ARCH_SUPPORTS
+	depends on !BR2_TOOLCHAIN_USES_GLIBC