Add .type, .size, and .p2align

Author: chorman0773

src/inline-assembly.md

@@ -528,6 +528,7 @@ The following directives are guaranteed to be supported by the assembler:
 - `.set`
 - `.align`
 - `.inst`
+- `.p2align`
 
 
 The following directives are guaranteed to be supported for `global_asm` only:
@@ -536,6 +537,8 @@ The following directives are guaranteed to be supported for `global_asm` only:
 - `.private_extern`
 - `.globl`
 - `.global`
+- `.size`
+- `.type`
 
 
 #### Target Specific Directive Support