[libc] Include cbrtf in the baremetal configuration (#98052)

This is available as of #97936.

Author: petrhosek

libc/config/baremetal/arm/entrypoints.txt

@@ -231,6 +231,7 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.canonicalize
     libc.src.math.canonicalizef
     libc.src.math.canonicalizel
+    libc.src.math.cbrtf
     libc.src.math.ceil
     libc.src.math.ceilf
     libc.src.math.ceill

libc/config/baremetal/riscv/entrypoints.txt

@@ -227,6 +227,7 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.canonicalize
     libc.src.math.canonicalizef
     libc.src.math.canonicalizel
+    libc.src.math.cbrtf
     libc.src.math.ceil
     libc.src.math.ceilf
     libc.src.math.ceill