update default musl version to 1.1.24

Makefile

@@ -4,7 +4,7 @@ SOURCES = sources
 CONFIG_SUB_REV = 3d5db9ebe860
 BINUTILS_VER = 2.32
 GCC_VER = 8.3.0
-MUSL_VER = 1.1.22
+MUSL_VER = 1.1.24
 GMP_VER = 6.1.2
 MPC_VER = 1.1.0
 MPFR_VER = 4.0.2