Tweak Makefile for OSX support
MODULE_big = pipelinedb
-SOURCES = $(shell find src/ -type f -name '*.c' -not -path 'src/test/*')
+SOURCES = $(shell find src -type f -name '*.c' -not -path 'src/test/*')
OBJS = $(patsubst %.c,%.o,$(SOURCES))
PG_CONFIG := pg_config
