[Pal/Linux-SGX] Cleanup enclave.lds to not specify program header

It is unnecessary to explicitly specify PHDRs in enclave.lds.

Pal/src/host/Linux-SGX/enclave.lds

@@ -2,17 +2,6 @@ OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64")
 OUTPUT_ARCH(i386:x86-64)
 ENTRY(enclave_entry)
 
-PHDRS
-{
-  headers PT_PHDR PHDRS;
-  text PT_LOAD FILEHDR PHDRS;
-  data PT_LOAD;
-  dynamic PT_DYNAMIC;
-  tls PT_TLS;
-  gnu_stack PT_GNU_STACK;
-  gnu_relro 0x6474e552;
-}
-
 SECTIONS
 {
   /* Read-only sections, merged into text segment; */
@@ -20,31 +9,31 @@ SECTIONS
   __text_start = .;
   . = SEGMENT_START("text-segment", 0) + SIZEOF_HEADERS;
   text_start = .;
-  .note.gnu.build-id : { *(.note.gnu.build-id) } :text
-  .gnu.hash      : { *(.gnu.hash) } :text
-  .dynsym        : { *(.dynsym) } :text
-  .dynstr        : { *(.dynstr) } :text
-  .gnu.version   : { *(.gnu.version) } :text
-  .gnu.version_d : { *(.gnu.version_d) } :text
-  .rela.dyn      : { *(.rela.dyn) } :text
-  .rela.plt      : { *(.rela.plt) } :text
-  .init          : { *(.init) } :text
-  .plt           : { *(.plt) *(.iplt) } :text
+  .note.gnu.build-id : { *(.note.gnu.build-id) }
+  .gnu.hash      : { *(.gnu.hash) }
+  .dynsym        : { *(.dynsym) }
+  .dynstr        : { *(.dynstr) }
+  .gnu.version   : { *(.gnu.version) }
+  .gnu.version_d : { *(.gnu.version_d) }
+  .rela.dyn      : { *(.rela.dyn) }
+  .rela.plt      : { *(.rela.plt) }
+  .init          : { *(.init) }
+  .plt           : { *(.plt) *(.iplt) }
   .text :
   {
     section_text = .;
     /* the rest of text segments */
     *(.text .stub .text.*);
-  } :text
-  .fini          : { *(.fini) } :text
-  .eh_frame_hdr  : { *(.eh_frame_hdr) } :text
-  .eh_frame      : ONLY_IF_RO { KEEP(*(.eh_frame)) } :text
+  }
+  .fini          : { *(.fini) }
+  .eh_frame_hdr  : { *(.eh_frame_hdr) }
+  .eh_frame      : ONLY_IF_RO { KEEP(*(.eh_frame)) }
   .rodata :
   {
     section_rodata = .;
     /* the rest of rodata */
     *(.rodata .rodata.*)
-  } :text
+  }
   __text_end = .;
 
   /* now adjust the address for the data segment */
@@ -59,29 +48,28 @@ SECTIONS
   {
     section_dynamic = .;
     *(.dynamic)
-  } :data :dynamic
-
+  }
 
   data_start = .;
-  .data.rel.ro   : { KEEP(*(.data.rel.ro)) } :data
-  .ctors         : { KEEP(*(.ctors)) } :data
-  .dtors         : { KEEP(*(.dtors)) } :data
-  .jcr           : { KEEP(*(.jcr)) } :data
-  .got           : { *(.got) *(.igot) } :data
-  .got.plt       : { *(.got.plt) *(.igot.plt) } :data
+  .data.rel.ro   : { KEEP(*(.data.rel.ro)) }
+  .ctors         : { KEEP(*(.ctors)) }
+  .dtors         : { KEEP(*(.dtors)) }
+  .jcr           : { KEEP(*(.jcr)) }
+  .got           : { *(.got) *(.igot) }
+  .got.plt       : { *(.got.plt) *(.igot.plt) }
   . = DATA_SEGMENT_RELRO_END (0, .);
   .data          :
   {
     section_data = .;
     /* the rest of data segment */
     *(.data .data.*);
-  } :data
+  }
   .bss           :
   {
     section_bss = .;
     *(.bss)
     *(COMMON)
-  } :data
+  }
   __data_end = .;
 
   . = DATA_SEGMENT_END(.);