fix updates to libtomcrypt/libtommath for out of tree builds

configure.ac

@@ -828,6 +828,7 @@ AS_MKDIR_P(libtomcrypt/src/modes/ecb)
 AS_MKDIR_P(libtomcrypt/src/modes/ofb)
 AS_MKDIR_P(libtomcrypt/src/modes/f8)
 AS_MKDIR_P(libtomcrypt/src/modes/lrw)
+AS_MKDIR_P(libtomcrypt/src/modes/xts)
 AS_MKDIR_P(libtomcrypt/src/pk/asn1/der/bit)
 AS_MKDIR_P(libtomcrypt/src/pk/asn1/der/boolean)
 AS_MKDIR_P(libtomcrypt/src/pk/asn1/der/choice)

libtomcrypt/Makefile.in

@@ -9,7 +9,8 @@ VERSION=1.17
 PLATFORM := $(shell uname | sed -e 's/_.*//')
-srcdir=.
+VPATH=@srcdir@
+srcdir=@srcdir@
 # Compiler and Linker Names
 #CC=gcc

libtommath/Makefile.in

@@ -2,7 +2,8 @@
 #
 #Tom St Denis
-srcdir=.
+VPATH=@srcdir@
+srcdir=@srcdir@
 # So that libtommath can include Dropbear headers for options and m_burn()
 CFLAGS += -I$(srcdir) -I../libtomcrypt/src/headers/ -I$(srcdir)/../libtomcrypt/src/headers/ -I../ -I$(srcdir)/../
@@ -26,8 +27,6 @@ endif
 coverage: LIBNAME:=-Wl,--whole-archive $(LIBNAME)  -Wl,--no-whole-archive
-include makefile.include
-
 LCOV_ARGS=--directory .
 #START_INS