build: Update Nyu-EFI and minor compiler flag changes

Author: mintsuki

GNUmakefile

@@ -133,6 +133,7 @@ ifeq ($(ARCH),ia32)
     override CFLAGS += \
         -m32 \
         -march=i686 \
+        -mabi=sysv \
         -mno-80387 \
         -mno-mmx
     override LDFLAGS += \
@@ -149,6 +150,7 @@ ifeq ($(ARCH),x86_64)
     override CFLAGS += \
         -m64 \
         -march=x86-64 \
+        -mabi=sysv \
         -mno-80387 \
         -mno-mmx \
         -mno-sse \