package/strace: disable for riscv32

strace does not support riscv32 yet.

https://lists.strace.io/pipermail/strace-devel/2019-August/009068.html

Fixes:
http://autobuild.buildroot.net/results/912776cc1da1719806058516a2cc2a47c8dbad9b/

Cc: Mark Corbin <mark.corbin@embecosm.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/strace/Config.in

@@ -2,7 +2,7 @@ config BR2_PACKAGE_STRACE
 	bool "strace"
 	# needs at least kernel headers 4.0 on nios2
 	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_0 || !BR2_nios2
-	depends on !BR2_nds32
+	depends on !BR2_nds32 && !BR2_RISCV_32
 	help
 	  A useful diagnostic, instructional, and debugging tool.
 	  Allows you to track what system calls a program makes