sqlite3: remove $(FPIC)

Defaulting to -fPIC is a bad idea, especially for executables (here:
sqlite3-cli). In short, there are certain security implications as well
as overhead/performance penalties. Details see:

https://wiki.gentoo.org/wiki/Project:Hardened/Position_Independent_Code_internals

The configure script is able to detect the need for PIC and adds the
flag when needed anyway (when compiling the library).

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

libs/sqlite3/Makefile

@@ -75,7 +75,7 @@ $(call Package/sqlite3/Default/description)
  formats.
 endef
 
-TARGET_CFLAGS += $(FPIC) \
+TARGET_CFLAGS += \
 	-DSQLITE_ENABLE_UNLOCK_NOTIFY=1 \
 	-DHAVE_ISNAN=1 \
 	-DHAVE_MALLOC_USABLE_SIZE=1