+ enabled compilation of the strings unit for PS1

rtl/ps1/Makefile

@@ -923,7 +923,7 @@ ifdef NO_EXCEPTIONS_IN_SYSTEM
 override FPCOPT+=-dNO_EXCEPTIONS_IN_SYSTEM
 endif
 ifeq ($(CPU_OS_TARGET),mipsel-ps1)
-override TARGET_UNITS+=$(SYSTEMUNIT) $(OBJPASUNIT) $(FPINTRESUNIT) $(ISO7185UNIT) $(CTYPESUNIT) $(SYSCONSTUNIT) $(UUCHARUNIT) libstd libetc libgpu libgte
+override TARGET_UNITS+=$(SYSTEMUNIT) $(OBJPASUNIT) $(FPINTRESUNIT) $(ISO7185UNIT) $(CTYPESUNIT) $(SYSCONSTUNIT) $(UUCHARUNIT) $(STRINGSUNIT) libstd libetc libgpu libgte
 endif
 override INSTALL_FPCPACKAGE=y y
 ifeq ($(CPU_OS_TARGET),mipsel-ps1)

rtl/ps1/Makefile.fpc

@@ -6,7 +6,7 @@ main=rtl
 [target]
 loaders=
 units=$(SYSTEMUNIT) $(OBJPASUNIT) $(FPINTRESUNIT) $(ISO7185UNIT) $(CTYPESUNIT) \
-  $(SYSCONSTUNIT) $(UUCHARUNIT) \
+  $(SYSCONSTUNIT) $(UUCHARUNIT) $(STRINGSUNIT) \
   libstd libetc libgpu libgte
 
 [require]