package/bcc: add missing dependencies to comment

Since its inception in 146498d13c48 (package/bcc: new package), not all
the dependencies of bcc are mirrored in the comment to be displayed when
those dependencies are not met.

Fix that by adding the missing pieces:
  - wchar,
  - threads
  - dynamic libs,

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Jugurtha BELKALEM <jugurtha.belkalem@smile.fr>
Cc: Romain Naour <romain.naour@gmail.com>
Cc: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/bcc/Config.in

@@ -38,8 +38,13 @@ config BR2_PACKAGE_BCC
 	  https://github.com/iovisor/bcc
 	  http://www.ebpf.io
 
-comment "bcc needs a glibc toolchain, C++, gcc >= 7, host gcc >= 7"
+comment "bcc needs a glibc toolchain, C++, wchar, threads, dynamic libs, gcc >= 7, host gcc >= 7"
 	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS
 	depends on BR2_USE_MMU
-	depends on !BR2_TOOLCHAIN_USES_GLIBC || !BR2_INSTALL_LIBSTDCPP \
-		|| !BR2_TOOLCHAIN_GCC_AT_LEAST_7 || !BR2_HOST_GCC_AT_LEAST_7
+	depends on !BR2_TOOLCHAIN_USES_GLIBC \
+		|| !BR2_TOOLCHAIN_GCC_AT_LEAST_7 \
+		|| !BR2_INSTALL_LIBSTDCPP \
+		|| !BR2_HOST_GCC_AT_LEAST_7 \
+		|| !BR2_USE_WCHAR \
+		|| !BR2_TOOLCHAIN_HAS_THREADS \
+		|| BR2_STATIC_LIBS