Aligb section at end in tcc_load_object_file

Noticed this when the crt1.o file on an updated riscv had a
text section where the size is not multiple of align.
This file is loaded first and when the c code is then compiled
the code is not aligned any more.
This results in:
alignment of code section not multiple of 4
in riscv64-gen.c

Author: hermantb

Diff for: tccelf.c

@@ -3245,6 +3245,11 @@ ST_FUNC int tcc_load_object_file(TCCState *s1,
         } else {
             s->data_offset += size;
         }
+        /* align end of section */
+        /* This is needed if we compile a c file after this */
+        if (s == text_section || s == data_section || s == rodata_section ||
+            s == bss_section || s == common_section)
+            s->data_offset += -s->data_offset & (s->sh_addralign - 1);
     next: ;
     }