tile: group .hottext* sections properly in vmlinux.lds

With this change such sections are grouped with regular text
in the vmlinux image; this change puts them at the front,
which is where the standard Linux includes .text.hot*.
This change should fix a recently-observed bug where a bunch of
symbols were being omitted from the /proc/kallsyms output
because they fell between _etext and _sinittext.

Signed-off-by: Chris Metcalf <[e-mail]>

arch/tile/kernel/vmlinux.lds.S

···
     KPROBES_TEXT
     IRQENTRY_TEXT
     __fix_text_end = .;   /* tile-cpack won't rearrange before this */
+    ALIGN_FUNCTION();
+    *(.hottext*)
     TEXT_TEXT
     *(.text.*)
     *(.coldtext*)