Merge pull request #69 from espressif/fix/esp32h21-linker

fix(esp32h21): use correct ROM addresses for libc functions

Author: erhankur

src/target/esp32h21/ld/esp32h21.rom.libc.ld

@@ -1,12 +1,12 @@
 esp_rom_newlib_init_common_mutexes = 0x40000494;
 memset = 0x40000498;
-memcpy = 0x4fc0026c;
-memmove = 0x4fc00270;
-memcmp = 0x4fc00274;
-strcpy = 0x4fc00278;
-strncpy = 0x4fc0027c;
-strcmp = 0x4fc00280;
-strncmp = 0x4fc00284;
+memcpy = 0x4000049c;
+memmove = 0x400004a0;
+memcmp = 0x400004a4;
+strcpy = 0x400004a8;
+strncpy = 0x400004ac;
+strcmp = 0x400004b0;
+strncmp = 0x400004b4;
 strlen = 0x400004b8;
 strstr = 0x400004bc;
 bzero = 0x400004c0;