Change default common-page-size to 64K on aarch64.  This enables the use
of RELRO since we are using 64K pages.

Index: binutils-2.25.0/bfd/elfnn-aarch64.c
===================================================================
--- binutils-2.25.0.orig/bfd/elfnn-aarch64.c
+++ binutils-2.25.0/bfd/elfnn-aarch64.c
@@ -9965,7 +9965,7 @@ const struct elf_size_info elfNN_aarch64_size_info =
 #define ELF_ARCH			bfd_arch_aarch64
 #define ELF_MACHINE_CODE		EM_AARCH64
 #define ELF_MAXPAGESIZE			0x10000
-#define ELF_COMMONPAGESIZE		0x1000
+#define ELF_COMMONPAGESIZE		0x10000
 
 #define bfd_elfNN_close_and_cleanup		\
   elfNN_aarch64_close_and_cleanup
Index: binutils-2.25.0/gold/aarch64.cc
===================================================================
--- binutils-2.25.0.orig/gold/aarch64.cc
+++ binutils-2.25.0/gold/aarch64.cc
@@ -791,7 +791,7 @@ const Target::Target_info Target_aarch64
   "/lib/ld.so.1",	// program interpreter
   0x400000,		// default_text_segment_address
   0x10000,		// abi_pagesize (overridable by -z max-page-size)
-  0x1000,		// common_pagesize (overridable by -z common-page-size)
+  0x10000,		// common_pagesize (overridable by -z common-page-size)
   false,                // isolate_execinstr
   0,                    // rosegment_gap
   elfcpp::SHN_UNDEF,	// small_common_shndx
@@ -818,7 +818,7 @@ const Target::Target_info Target_aarch64
   "/lib/ld.so.1",	// program interpreter
   0x400000,		// default_text_segment_address
   0x10000,		// abi_pagesize (overridable by -z max-page-size)
-  0x1000,		// common_pagesize (overridable by -z common-page-size)
+  0x10000,		// common_pagesize (overridable by -z common-page-size)
   false,                // isolate_execinstr
   0,                    // rosegment_gap
   elfcpp::SHN_UNDEF,	// small_common_shndx
@@ -845,7 +845,7 @@ const Target::Target_info Target_aarch64
   "/lib/ld.so.1",	// program interpreter
   0x400000,		// default_text_segment_address
   0x10000,		// abi_pagesize (overridable by -z max-page-size)
-  0x1000,		// common_pagesize (overridable by -z common-page-size)
+  0x10000,		// common_pagesize (overridable by -z common-page-size)
   false,                // isolate_execinstr
   0,                    // rosegment_gap
   elfcpp::SHN_UNDEF,	// small_common_shndx
@@ -872,7 +872,7 @@ const Target::Target_info Target_aarch64
   "/lib/ld.so.1",	// program interpreter
   0x400000,		// default_text_segment_address
   0x10000,		// abi_pagesize (overridable by -z max-page-size)
-  0x1000,		// common_pagesize (overridable by -z common-page-size)
+  0x10000,		// common_pagesize (overridable by -z common-page-size)
   false,                // isolate_execinstr
   0,                    // rosegment_gap
   elfcpp::SHN_UNDEF,	// small_common_shndx