toolchain/musl: update to version 1.1.21

<https://www.openwall.com/lists/musl/2019/01/21/8>
"This release makes improvements with respect to default thread stack
size, including increasing the default from 80k to 128k, increasing
the default guard size from 4k to 8k, and allowing the default to be
increased via ELF headers so that programs that need larger stacks can
be build without source-level changes, using just LDFLAGS.
Insufficient stack size for AIO threads on kernels that don't honor
the constant MINSIGSTKSZ is also fixed.

The glob core has been rewritten to fix inability to see past
searchable-but-unreadable path components, and to avoid excessive
stack usage and unnecessary syscalls. The tsearch AVL tree
implementation has also been rewritten for better size and
performance. The math library adds more native single-instruction
implementations for arm, s390x, powerpc, and x86_64.

Various bugs are fixed, including several possible deadlocks, one of
which was a new regression in 1.1.20."

detailed release notes can be found in the WHATSNEW file:
<http://git.musl-libc.org/cgit/musl/tree/WHATSNEW#n1989>

Tested-by: Koen Vandeputte <[email protected]>
Signed-off-by: Christian Lamparter <[email protected]>

toolchain/musl/common.mk

@@ -8,13 +8,13 @@ include $(TOPDIR)/rules.mk
 include $(INCLUDE_DIR)/target.mk
 
 PKG_NAME:=musl
-PKG_VERSION:=1.1.20
-PKG_RELEASE:=2
+PKG_VERSION:=1.1.21
+PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
-PKG_SOURCE_VERSION:=0fa1e638e87cf257e9f96b4019b2076afd674a19
-PKG_MIRROR_HASH:=0a49559e845f51aaf006539176a36d6527957affd2838e71fd43275b737e90fe
+PKG_SOURCE_VERSION:=1691b23955590d1eb66a11158fdd91c86337e886
+PKG_MIRROR_HASH:=4fa312d0ca020d31603ced84a7103fb328c6ae9508239491a228be17e7807147
 PKG_SOURCE_URL:=git://git.musl-libc.org/musl
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.xz
 

toolchain/musl/patches/110-read_timezone_from_fs.patch

@@ -1,6 +1,6 @@
 --- a/src/time/__tz.c
 +++ b/src/time/__tz.c
-@@ -23,6 +23,9 @@ static int r0[5], r1[5];
+@@ -25,6 +25,9 @@ static int r0[5], r1[5];
  static const unsigned char *zi, *trans, *index, *types, *abbrevs, *abbrevs_end;
  static size_t map_size;
  

toolchain/musl/patches/200-add_libssp_nonshared.patch

@@ -24,7 +24,7 @@ Signed-off-by: Steven Barth <[email protected]>
 +OBJ_DIRS = $(sort $(patsubst %/,%,$(dir $(ALL_LIBS) $(ALL_TOOLS) $(ALL_OBJS) $(GENH) $(GENH_INT))) obj/include obj/libssp_nonshared)
  
  $(ALL_LIBS) $(ALL_TOOLS) $(ALL_OBJS) $(ALL_OBJS:%.o=%.lo) $(GENH) $(GENH_INT): | $(OBJ_DIRS)
-
+ 
 @@ -113,6 +113,8 @@ obj/crt/rcrt1.o: $(srcdir)/ldso/dlstart.
  
  obj/crt/Scrt1.o obj/crt/rcrt1.o: CFLAGS_ALL += -fPIC
@@ -34,7 +34,7 @@ Signed-off-by: Steven Barth <[email protected]>
  OPTIMIZE_SRCS = $(wildcard $(OPTIMIZE_GLOBS:%=$(srcdir)/src/%))
  $(OPTIMIZE_SRCS:$(srcdir)/%.c=obj/%.o) $(OPTIMIZE_SRCS:$(srcdir)/%.c=obj/%.lo): CFLAGS += -O3
  
-@@ -165,6 +166,11 @@ lib/libc.a: $(AOBJS)
+@@ -165,6 +167,11 @@ lib/libc.a: $(AOBJS)
  	$(AR) rc $@ $(AOBJS)
  	$(RANLIB) $@