trivial: remove muslc dependency

Signed-off-by: Curtis Millar <curtis.millar@data61.csiro.au>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3296e25..0ed0f60 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -124,4 +124,4 @@
 
 # A C library is still needed here to provide memcpy, stdint.h, and
 # elf.h
-target_link_libraries(sel4runtime PUBLIC sel4 muslc sel4_autoconf PRIVATE sel4runtime_Config)
+target_link_libraries(sel4runtime PUBLIC sel4 sel4_autoconf PRIVATE sel4runtime_Config)