acsccid: propagate dependencies from pcsc-lite

The new package acsccid properly propagated the dependency of libusb,
but not the one of pcsc-lite, causing pcsc-lite to be selected in
situation where it shouldn't be (such as in static-only
configurations).

Fixes:

  http://autobuild.buildroot.org/results/e0b/e0b205dceb84303d1dfaf8b39562b934f6914b8d/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/acsccid/Config.in

@@ -1,6 +1,8 @@
 config BR2_PACKAGE_ACSCCID
 	bool "acsccid"
-	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_TOOLCHAIN_HAS_THREADS # pcsc-lite, libusb
+	depends on BR2_USE_MMU # pcsc-lite
+	depends on !BR2_STATIC_LIBS # pcsc-lite
 	select BR2_PACKAGE_PCSC_LITE
 	# Even though there is a --disable-libusb option, it has in
 	# fact no effect, and acsccid really requires libusb.
@@ -11,5 +13,7 @@ config BR2_PACKAGE_ACSCCID
 
 	  http://acsccid.sourceforge.net/
 
-comment "acsccid needs a toolchain w/ threads"
-	depends on !BR2_TOOLCHAIN_HAS_THREADS
+comment "acsccid needs a toolchain w/ threads, dynamic library"
+	depends on BR2_USE_MMU
+	depends on !BR2_TOOLCHAIN_HAS_THREADS || \
+		BR2_STATIC_LIBS