bpf: Update logging functions to work with BTF

* Based on 430e68d10b,
  77d2e05abd
  and a2a7d57010

Change-Id: I27e2c804726078646ca9beda31cbae2a745dfd47

scripts/module-lto.lds

@@ -0,0 +1,22 @@
+
+SECTIONS {
+ /DISCARD/ : {
+  *(.eh_frame)
+ }
+ .bss : {
+  *(.bss .bss.[0-9a-zA-Z_]*)
+  *(.bss..L*)
+ }
+ .data : {
+  *(.data .data.[0-9a-zA-Z_]*)
+  *(.data..L*)
+ }
+ .rodata : {
+  *(.rodata .rodata.[0-9a-zA-Z_]*)
+  *(.rodata..L*)
+ }
+ .text : ALIGN((1 << 12)) {
+  *(.text.__cfi_check)
+  *(.text .text.[0-9a-zA-Z_]* .text..L.cfi*)
+ }
+}