Reapply "[libc] printf, putchar and vprintf in bareemetal entrypoints… (#95619)

This reverts commit eca988a. The
underlying libc issue was fixed by PR#95576.

The original PR is #95436 , which adds printf, putchar and vprintf in
bareemetal entrypoints

Author: zeroomega

libc/config/baremetal/arm/entrypoints.txt

@@ -80,8 +80,11 @@ set(TARGET_LIBC_ENTRYPOINTS
 
     # stdio.h entrypoints
     libc.src.stdio.remove
+    libc.src.stdio.printf
+    libc.src.stdio.putchar
     libc.src.stdio.sprintf
     libc.src.stdio.snprintf
+    libc.src.stdio.vprintf
     libc.src.stdio.vsprintf
     libc.src.stdio.vsnprintf
 

libc/config/baremetal/riscv/entrypoints.txt

@@ -80,8 +80,11 @@ set(TARGET_LIBC_ENTRYPOINTS
 
     # stdio.h entrypoints
     libc.src.stdio.remove
+    libc.src.stdio.printf
+    libc.src.stdio.putchar
     libc.src.stdio.sprintf
     libc.src.stdio.snprintf
+    libc.src.stdio.vprintf
     libc.src.stdio.vsprintf
     libc.src.stdio.vsnprintf