Fix issues with .note.GNU-stack section directives.

bionic/libm/x86_64/s_log1p.S:809:2: error: changed section type for .note.GNU-stack, expected: 0x1
 .section .note.GNU-stack, ""
 ^

These assembly sources are missing @progbits to set the section flags
correctly. Without it, they end up denoting a different section type. By
adding the @progbits explicitly, we see the same section flags with
readelf.

[ 4] .note.GNU-stack   PROGBITS        0000000000000000 000593 000000 00      0   0  1

Bug: http://b/155835175
Test: m for aosp_x86_64
Change-Id: Ifff35d35f5f9ded5938e88677b18805809820e9f
diff --git a/libm/x86/libm_reduce_pi04l.S b/libm/x86/libm_reduce_pi04l.S
index af6a7d0..25976ea 100644
--- a/libm/x86/libm_reduce_pi04l.S
+++ b/libm/x86/libm_reduce_pi04l.S
@@ -3714,5 +3714,5 @@
 	.type	__4onpi_31l,@object
 	.size	__4onpi_31l,6444
 	.data
-	.section .note.GNU-stack, ""
+	.section .note.GNU-stack, "",@progbits
 # End