liburing: use -fPIC for both static and shared libraries
At least for ceph, it fails to statically link with liburing because
we don't use -fPIC for the static version of the library.
This reverts commit
@@ -3,8 +3,8 @@ includedir ?= $(prefix)/include
libdir ?= $(prefix)/lib
CFLAGS ?= -g -fomit-frame-pointer -O2
-override CFLAGS += -Wall -Iinclude/
-SO_CFLAGS=-shared -fPIC $(CFLAGS)
+override CFLAGS += -Wall -fPIC -Iinclude/
+SO_CFLAGS=-shared $(CFLAGS)
L_CFLAGS=$(CFLAGS)
LINK_FLAGS=
LINK_FLAGS+=$(LDFLAGS)
