Change link commands for glibc executables to build PIEs

Patch by Kevin F. Quinn <kevquinn@gentoo.org>

--- Makeconfig
+++ Makeconfig
@@ -423,10 +423,10 @@
 
 # Command for linking programs with the C library.
 ifndef +link
-+link = $(CC) -nostdlib -nostartfiles -o $@ \
++link = $(CC) -nostdlib -nostartfiles -fPIE -pie -o $@ \
 	      $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 	      $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
-	      $(addprefix $(csu-objpfx),$(start-installed-name)) \
+	      $(addprefix $(csu-objpfx),S$(start-installed-name)) \
 	      $(+preinit) $(+prector) \
 	      $(filter-out $(addprefix $(csu-objpfx),start.o \
 						     $(start-installed-name))\
@@ -451,7 +451,7 @@
 ifndef +link-static
 +link-static = $(CC) -nostdlib -nostartfiles -static -o $@ \
 	      $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F))  \
-	      $(addprefix $(csu-objpfx),$(static-start-installed-name)) \
+	      $(addprefix $(csu-objpfx),S$(static-start-installed-name)) \
 	      $(+preinit) $(+prector) \
 	      $(filter-out $(addprefix $(csu-objpfx),start.o \
 						     $(start-installed-name))\
@@ -549,8 +549,8 @@
 ifeq ($(elf),yes)
 +preinit = $(addprefix $(csu-objpfx),crti.o)
 +postinit = $(addprefix $(csu-objpfx),crtn.o)
-+prector = `$(CC) --print-file-name=crtbegin.o`
-+postctor = `$(CC) --print-file-name=crtend.o`
++prector = `$(CC) --print-file-name=crtbeginS.o`
++postctor = `$(CC) --print-file-name=crtendS.o`
 # Variants of the two previous definitions for linking PIE programs.
 +prectorS = `$(CC) --print-file-name=crtbeginS.o`
 +postctorS = `$(CC) --print-file-name=crtendS.o`