Make exceptions work again, get std::regex up

Exceptions are broken on all builds (GCC4.8-9.1) due to the removal of the PROGMEM non-32b read exception handler (added in the unstable pre3.0.0). Build the exception code with -mforce-l32 and patch accordingly to avoid LoadStore errors. Apply patches to select portions of the regex lib which use _stype_ (which is now in flash).
esp8266 · Jul 15, 2019 · 1cb9282 · 1cb9282
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commit 1cb9282
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diff --git a/package/package_esp8266com_index.template.json b/package/package_esp8266com_index.template.json
@@ -111,17 +111,17 @@
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@@ -192,41 +192,41 @@
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diff --git a/tools/sdk/lib/libgcc.a b/tools/sdk/lib/libgcc.a
diff --git a/tools/sdk/lib/libhal.a b/tools/sdk/lib/libhal.a
diff --git a/tools/sdk/lib/libstdc++-exc.a b/tools/sdk/lib/libstdc++-exc.a
diff --git a/tools/sdk/lib/libstdc++.a b/tools/sdk/lib/libstdc++.a
diff --git a/tools/sdk/libc/xtensa-lx106-elf/lib/crt0.o b/tools/sdk/libc/xtensa-lx106-elf/lib/crt0.o
diff --git a/tools/sdk/libc/xtensa-lx106-elf/lib/libc.a b/tools/sdk/libc/xtensa-lx106-elf/lib/libc.a
diff --git a/tools/sdk/libc/xtensa-lx106-elf/lib/libg.a b/tools/sdk/libc/xtensa-lx106-elf/lib/libg.a
diff --git a/tools/sdk/libc/xtensa-lx106-elf/lib/libm.a b/tools/sdk/libc/xtensa-lx106-elf/lib/libm.a