icu: fix compilation under CentOS 7

CentOS 7's GCC is quite old and does not put max_align_t under std.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

libs/icu/Makefile

@@ -11,7 +11,7 @@ PKG_NAME:=icu4c
 MAJOR_VERSION:=67
 MINOR_VERSION:=1
 PKG_VERSION:=$(MAJOR_VERSION).$(MINOR_VERSION)
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(MAJOR_VERSION)_$(MINOR_VERSION)-src.tgz
 PKG_SOURCE_URL:=https://github.com/unicode-org/icu/releases/download/release-$(MAJOR_VERSION)-$(MINOR_VERSION)

libs/icu/patches/010-max_align_t.patch

@@ -0,0 +1,60 @@
+--- a/common/uarrsort.cpp
++++ b/common/uarrsort.cpp
+@@ -37,7 +37,7 @@ enum {
+ };
+ 
+ static constexpr int32_t sizeInMaxAlignTs(int32_t sizeInBytes) {
+-    return (sizeInBytes + sizeof(std::max_align_t) - 1) / sizeof(std::max_align_t);
++    return (sizeInBytes + sizeof(max_align_t) - 1) / sizeof(max_align_t);
+ }
+ 
+ /* UComparator convenience implementations ---------------------------------- */
+@@ -141,7 +141,7 @@ static void
+ insertionSort(char *array, int32_t length, int32_t itemSize,
+               UComparator *cmp, const void *context, UErrorCode *pErrorCode) {
+ 
+-    icu::MaybeStackArray<std::max_align_t, sizeInMaxAlignTs(STACK_ITEM_SIZE)> v;
++    icu::MaybeStackArray<max_align_t, sizeInMaxAlignTs(STACK_ITEM_SIZE)> v;
+     if (sizeInMaxAlignTs(itemSize) > v.getCapacity() &&
+             v.resize(sizeInMaxAlignTs(itemSize)) == nullptr) {
+         *pErrorCode = U_MEMORY_ALLOCATION_ERROR;
+@@ -235,7 +235,7 @@ static void
+ quickSort(char *array, int32_t length, int32_t itemSize,
+             UComparator *cmp, const void *context, UErrorCode *pErrorCode) {
+     /* allocate two intermediate item variables (x and w) */
+-    icu::MaybeStackArray<std::max_align_t, sizeInMaxAlignTs(STACK_ITEM_SIZE) * 2> xw;
++    icu::MaybeStackArray<max_align_t, sizeInMaxAlignTs(STACK_ITEM_SIZE) * 2> xw;
+     if(sizeInMaxAlignTs(itemSize)*2 > xw.getCapacity() &&
+             xw.resize(sizeInMaxAlignTs(itemSize) * 2) == nullptr) {
+         *pErrorCode=U_MEMORY_ALLOCATION_ERROR;
+--- a/common/utext.cpp
++++ b/common/utext.cpp
+@@ -569,7 +569,7 @@ enum {
+ 
+ struct ExtendedUText {
+     UText               ut;
+-    std::max_align_t    extension;
++    max_align_t    extension;
+ };
+ 
+ static const UText emptyText = UTEXT_INITIALIZER;
+@@ -584,7 +584,7 @@ utext_setup(UText *ut, int32_t extraSpace, UErrorCode *status) {
+         // We need to heap-allocate storage for the new UText
+         int32_t spaceRequired = sizeof(UText);
+         if (extraSpace > 0) {
+-            spaceRequired = sizeof(ExtendedUText) + extraSpace - sizeof(std::max_align_t);
++            spaceRequired = sizeof(ExtendedUText) + extraSpace - sizeof(max_align_t);
+         }
+         ut = (UText *)uprv_malloc(spaceRequired);
+         if (ut == NULL) {
+--- a/tools/toolutil/toolutil.cpp
++++ b/tools/toolutil/toolutil.cpp
+@@ -245,7 +245,7 @@ struct UToolMemory {
+     char name[64];
+     int32_t capacity, maxCapacity, size, idx;
+     void *array;
+-    alignas(std::max_align_t) char staticArray[1];
++    alignas(max_align_t) char staticArray[1];
+ };
+ 
+ U_CAPI UToolMemory * U_EXPORT2