cc3200: Fix bootloader and modpyb after printf overhaul.

The bootloader needs string0.c because of memset, memcpy and others,
without string0.c it magically links, but calling any of those
functions results in a hard fault.
In debug mode, modpyb needs printf, and including stdio.h leads to
conflicts due to the redefinitions made in the simplelink drivers.

cc3200/bootmgr/bootloader.mk

@@ -67,8 +67,13 @@ BOOT_STM_SRC_C = $(addprefix stmhal/,\
 	printf.c \
 	)
 
+BOOT_LIB_SRC_C = $(addprefix lib/,\
+	libc/string0.c \
+	)
+
 OBJ  = $(addprefix $(BUILD)/, $(BOOT_HAL_SRC_C:.c=.o) $(BOOT_SL_SRC_C:.c=.o) $(BOOT_CC3100_SRC_C:.c=.o) $(BOOT_UTIL_SRC_C:.c=.o) $(BOOT_MISC_SRC_C:.c=.o))
 OBJ += $(addprefix $(BUILD)/, $(BOOT_MAIN_SRC_C:.c=.o) $(BOOT_MAIN_SRC_S:.s=.o) $(BOOT_PY_SRC_C:.c=.o) $(BOOT_STM_SRC_C:.c=.o))
+OBJ += $(addprefix $(BUILD)/, $(BOOT_LIB_SRC_C:.c=.o))
 
 # Add the linker script
 LINKER_SCRIPT = bootmgr/bootmgr.lds

cc3200/util/std.h

@@ -29,6 +29,7 @@
 
 typedef unsigned int size_t;
 
+int printf(const char *fmt, ...);
 int snprintf(char *str, size_t size, const char *fmt, ...);
 
 // Convenience function, defined in main.c.