Reject .so files using ELF TLS.

Bug: http://b/74361956
Test: ran tests
Change-Id: I53e71252eb08c607c2c436dcba433374c8c53887
diff --git a/libc/include/elf.h b/libc/include/elf.h
index a8d62db..f5b2091 100644
--- a/libc/include/elf.h
+++ b/libc/include/elf.h
@@ -260,6 +260,8 @@
 #define DT_ANDROID_RELASZ (DT_LOOS + 5)
 
 #define DT_GNU_HASH 0x6ffffef5
+#define DT_TLSDESC_PLT 0x6ffffef6
+#define DT_TLSDESC_GOT 0x6ffffef7
 
 /* http://www.sco.com/developers/gabi/latest/ch4.eheader.html */
 #define EI_ABIVERSION 8