[libc][math] Add asin to baremetal Arm and AArch64 (#167339)

This patch adds `asin` to the entry points for Arm and AArch64.

Tests have been run using Arm Toolchain for Embedded, a downstream
toolchain.

Author: vhscampos

libc/config/baremetal/aarch64/entrypoints.txt

@@ -323,6 +323,7 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.acos
     libc.src.math.acosf
     libc.src.math.acoshf
+    libc.src.math.asin
     libc.src.math.asinf
     libc.src.math.asinhf
     libc.src.math.atan2

libc/config/baremetal/arm/entrypoints.txt

@@ -326,6 +326,7 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.acos
     libc.src.math.acosf
     libc.src.math.acoshf
+    libc.src.math.asin
     libc.src.math.asinf
     libc.src.math.asinhf
     libc.src.math.atan2