dep: Add biscuit and riscv-disas

dep/riscv-disas/CMakeLists.txt

@@ -0,0 +1,7 @@
+add_library(riscv-disas
+	include/riscv-disas.h
+	src/riscv-disas.c
+)
+
+target_include_directories(riscv-disas PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/include")
+