Move -fPIC -D_REENTRANT to UnixCommon target config file.

configure/CONFIG_COMMON

@@ -90,7 +90,6 @@ GCC_RANLIB = $(GNU_BIN)/$(GNU_TARGET_PREFIX)ranlib$(CMPLR_SUFFIX)
 GCC_ANSI = $(GCC) -ansi 
 GCC_STRICT = $(GCC) -ansi -pedantic
 GCC_TRAD = $(GCC) -traditional
-GCC_DEP_CFLAGS =  -fPIC -D_REENTRANT
 GCC_WARN_YES = -Wall
 GCC_WARN_NO = -w
 GCC_OPT_YES = -O3 -g
@@ -110,7 +109,6 @@ G++_NORMAL = $(G++) -ansi -pedantic
 G++_STRICT = $(G++) -ansi -pedantic -Wtraditional
 G++_TRAD = $(G++) -traditional
 G++_TEMPL_INST_FLAG = -DEXPL_TEMPL
-G++_DEP_CFLAGS =  -fPIC -D_REENTRANT
 G++_WARN_YES = -Wall \
       -Wmissing-prototypes -Woverloaded-virtual \
       -Wwrite-strings -Wconversion -Wstrict-prototypes\